Decimals- Term 2 Flashcards

1
Q

What is 2.34 x 4.5?

A

10.53

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2
Q

6.13 x 42?

A

257.46

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3
Q

658/3

A

219.3recurring

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4
Q

Divide 58.2 by 0.3

A

58.2/0.3 = 582/3 = 194

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5
Q

5.29 / 0.05

A

5.29/0.05 = 529/5 = 105.8

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6
Q

Given that 3.5 x 5.6 = 19.6

34x560

A

19600

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7
Q

Given that 8.4/0.2 =20.16

8.4/0.02

A

201.6

Handle denominator and numerator separately

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8
Q

Given that 34 x 56 = 1904

190.4 / 0.56

A

340

Because 1904/56=34

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9
Q

Given that 575/23 = 25

5.75 / 2.5

A

2.3

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10
Q

What is the format of standard form?

A

a x 10^n

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11
Q

In standard form, what must the power be?

A

An integer

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12
Q

In standard form, what must a in a x 10^n be?

A

No more than 10 and no less than 1

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13
Q

Write 7.3’x 104 as an ordinary number

A

73000

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14
Q

Write 4.13 x 10^-3 as an ordinary number

A

0.00413

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15
Q

Write 0.031 in standard form

A

3.1 x 10^-2

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16
Q

Work out (4x10^5)x(5x10^8) and give your answer in standard form

A

20x10^13

Times the first integers and add the indices

17
Q

Work out (2x10^-3) / (5x10^5) and give your answer in standard form

A

2/5=0.4
0.4x10^-8

4x10^-9

18
Q

What is 10% as a fraction?

A

1/10

19
Q

What is 25% as a fraction?

A

1/4

20
Q

What is 50% as a fraction?

A

1/2

21
Q

What is 75% as a fraction?

A

3/4

22
Q

What is 100% as a fraction?

A

1

23
Q

What is 1% as a fraction?

A

1/100

24
Q

What is 1/10 as a decimal?

A

0.1

25
Q

What is 1/4 as a decimal?

A

0.25

26
Q

What is 1/2 as a decimal?

A

0.5

27
Q

What is 3/4 as a decimal?

A

0.75

28
Q

How do you turn a percentage into a decimal?

A

Divide by 100

29
Q

35% = what as a decimal?

A

0.35

30
Q

How do you turn a percentage into a fraction?

A

Write it over 100

31
Q

What is 35% as a fraction?

A

35/100=7/20

32
Q

How do you turn a decimal into a percentage?

A

Times by 100

33
Q

How do you turn a decimal into a fraction?

A

Multiply by 100 and write over 100

34
Q

Turn 0.15 into a percentage

A

15%

35
Q

Turn 0.32 into a fraction

A

32/100=16/50=8/25

36
Q

How do you turn a fraction into a decimal?

A

Try to write it over 100 or divide the numerator by the denominator

37
Q

Turn 3/8 into a decimal

A

3/8=300/800=37.5/100=0.375

3/8=3 divided by 8=0.375

38
Q

How do you change a fraction into a percentage?

A

Write it over 100 or change to decimal and x100

39
Q

Turn 2/3 into a percentage

A

200/300=2 divided by 3= 66.6recurring/100=66.6recurring%